session_log_buffer.h

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#pragma once

 
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
 
// Configuration
/*
 * Keep roughly 16 MiB of formatted logs in the interactive history.  The
 * former 8 MiB ring was exhausted by a few seconds of verbose transport logs,
 * making the log viewer appear to scroll while silently losing the requested
 * history.
 */
#define SESSION_LOG_BUFFER_SIZE 16384
#define SESSION_LOG_LINE_MAX 1024

typedef struct {
  char message[SESSION_LOG_LINE_MAX]; 
  uint64_t sequence;                  
} session_log_entry_t;

typedef struct session_log_buffer session_log_buffer_t;

session_log_buffer_t *session_log_buffer_create(void);

void session_log_buffer_destroy(session_log_buffer_t *buf);

void session_log_buffer_clear(session_log_buffer_t *buf);

void session_log_buffer_append(session_log_buffer_t *buf, const char *message);

size_t session_log_buffer_get_recent(session_log_buffer_t *buf, session_log_entry_t *out_entries, size_t max_count);